AdvanSix (NYSE: ASIX) SVP withholds 8,008 shares for tax obligations

Rhea-AI Filing Summary

AdvanSix Inc. senior vice president and general counsel Achilles B. Kintiroglou reported a tax-related share disposition. On February 28, 2026, 8,008 shares of common stock were withheld at $17.47 per share to cover tax obligations tied to vested restricted stock units. After this withholding, he directly owned 50,363 shares of AdvanSix common stock.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Kintiroglou Achilles B.

(Last) (First) (Middle)

300 KIMBALL DRIVE, SUITE 101

(Street)

PARSIPPANY NJ 07054

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
AdvanSix Inc. [ ASIX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, General Counsel

3. Date of Earliest Transaction (Month/Day/Year)
02/28/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.01	02/28/2026		F		8,008(1)	D	$17.47	50,363	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Shares withheld to satisfy tax withholding obligations related to Restricted Stock Units that vested on February 28, 2026.

Remarks:

	/s/ Achilles B. Kintiroglou	03/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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FAQ

What did the AdvanSix (ASIX) Form 4 report for Achilles B. Kintiroglou?

The Form 4 reports a tax-related share disposition by Achilles B. Kintiroglou. On February 28, 2026, 8,008 AdvanSix common shares were withheld to satisfy tax obligations from vested restricted stock units, leaving him with 50,363 directly owned shares afterward.

How many AdvanSix (ASIX) shares were disposed of in the latest insider filing?

The filing shows 8,008 AdvanSix common shares were disposed of. These shares were withheld at a price of $17.47 per share to cover tax withholding obligations related to restricted stock units that vested on February 28, 2026.

Was the AdvanSix (ASIX) insider transaction an open-market sale?

No, the transaction was not an open-market sale. The 8,008 AdvanSix shares were withheld to satisfy tax withholding obligations for restricted stock units that vested on February 28, 2026, rather than being sold in the open market.

What is Achilles B. Kintiroglou’s role at AdvanSix (ASIX)?

Achilles B. Kintiroglou serves as senior vice president and general counsel of AdvanSix. He is an officer of the company and the Form 4 reports a tax-withholding disposition of shares related to his restricted stock unit vesting.

How many AdvanSix (ASIX) shares does the insider hold after this transaction?

After the tax-withholding disposition, Achilles B. Kintiroglou directly holds 50,363 AdvanSix common shares. This figure reflects his ownership following the withholding of 8,008 shares to cover tax obligations from vested restricted stock units.

What transaction code was used in the AdvanSix (ASIX) Form 4 filing?

The insider transaction used code F, indicating shares were used to pay tax obligations or exercise costs. In this case, 8,008 AdvanSix shares were withheld to satisfy tax withholding obligations linked to restricted stock units that vested on February 28, 2026.